pragma solidity ^0.4.15;

library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

contract Base {
    modifier only(address allowed) {
        require(msg.sender == allowed);
        _;
    }

    // *************************************************
    // *          reentrancy handling                  *
    // *************************************************

    uint constant internal L00 = 2 ** 0;
    uint constant internal L01 = 2 ** 1;
    uint constant internal L02 = 2 ** 2;
    uint constant internal L03 = 2 ** 3;
    uint constant internal L04 = 2 ** 4;
    uint constant internal L05 = 2 ** 5;

    uint private bitlocks = 0;

    modifier noAnyReentrancy {
        var _locks = bitlocks;
        require(_locks == 0);
        bitlocks = uint(-1);
        _;
        bitlocks = _locks;
    }

}

contract Owned {
    address public owner;
    address public newOwner;
    
    modifier onlyOwner() {
        require(msg.sender == owner);
        _;
    }

    function Owned() public {
        owner = msg.sender;
    }

    function transferOwnership(address _newOwner) onlyOwner public {
        newOwner = _newOwner;
    }

    function acceptOwnership() onlyOwner public {
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

    event OwnershipTransferred(address indexed _from, address indexed _to);
}

contract ERC20 {
    uint256 public totalSupply;
  
    function balanceOf(address who) public constant returns (uint256);
    function transfer(address to, uint256 value) public returns (bool);
    function allowance(address owner, address spender) public constant returns (uint256);
    function transferFrom(address from, address to, uint256 value) public returns (bool);
    function approve(address spender, uint256 value) public returns (bool);
  
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);
}

contract StandartToken is ERC20 {
    using SafeMath for uint256;

    mapping(address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    
    bool public isStarted = false;
    
    modifier isStartedOnly() {
        require(isStarted);
        _;
    }

    function transfer(address _to, uint256 _value) isStartedOnly public returns (bool) {
        require(_to != address(0));
        require(_value <= balances[msg.sender]);

        // SafeMath.sub will throw if there is not enough balance.
        balances[msg.sender] = balances[msg.sender].sub(_value);
        balances[_to] = balances[_to].add(_value);
        Transfer(msg.sender, _to, _value);
        return true;
    }

    function balanceOf(address _owner) public constant returns (uint256 balance) {
        return balances[_owner];
    }
  
    function transferFrom(address _from, address _to, uint256 _value) isStartedOnly public returns (bool) {
        require(_to != address(0));
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);

        balances[_from] = balances[_from].sub(_value);
        balances[_to] = balances[_to].add(_value);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
        Transfer(_from, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) isStartedOnly public returns (bool) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }

    function increaseApproval (address _spender, uint _addedValue) isStartedOnly public returns (bool success) {
        allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
        Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }

    function decreaseApproval (address _spender, uint _subtractedValue) isStartedOnly public returns (bool success) {
        uint oldValue = allowed[msg.sender][_spender];
        if (_subtractedValue > oldValue) {
            allowed[msg.sender][_spender] = 0;
        } else {
            allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
        }
        Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }
}


contract AnonymToken is Owned, StandartToken {
    string public name = "Anonym";
    string public symbol = "ANM";
    uint public decimals = 18;
    
    address public crowdsaleMinter;
    
    event Mint(address indexed to, uint256 amount);

    modifier canMint() {
        require(!isStarted);
        _;
    }
    
    modifier onlyCrowdsaleMinter(){
        require(msg.sender == crowdsaleMinter);
        _;
    }
    
    function () public {
        revert();
    }
    
    function setCrowdsaleMinter(address _crowdsaleMinter)
        public
        onlyOwner
        canMint
    {
        crowdsaleMinter = _crowdsaleMinter;
    }

    function mint(address _to, uint256 _amount)
        onlyCrowdsaleMinter
        canMint
        public
        returns (bool)
    {
        totalSupply = totalSupply.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        Mint(_to, _amount);
        return true;
    }

    function start()
        onlyCrowdsaleMinter
        canMint
        public
        returns (bool)
    {
        isStarted = true;
        return true;
    }
}